Official Hong Kong Observatory forecasts indicate a minimum of 28°C for September 28 under a subtropical ridge producing mainly fine skies, light southwest winds, and low rainfall chances. Overnight radiative cooling under clear to partly cloudy conditions supports a low near 27–28°C, with trader consensus split between these outcomes reflecting minor uncertainties in exact cooling rates, local urban heat effects, and any last-minute cloud increases. Persistent hot, dry patterns over recent days have kept overnight lows elevated compared to climatology, while model consensus shows limited variability in steering or moisture ahead of resolution.